里亚谱诺夫矩阵方程式的两种解法

这篇文章将推导出里亚谱诺夫矩阵方程式的两种新解法。一种方法是使得里氏矩阵方程式的模最小作为一种评价函数、用迭代法求得矩阵P;另一种方法是求解未知矩阵P的联立方程的系数直接由A矩阵元素所确定,而不是由A~(-1)的元素所确定,这样大大减小了小数点以下有效数字的取舍引起的误差。     

重氮母片的特性及其对复印的影响

研究了重氮母片的特性对重氮复印的影响。试验结果表明,彩色母片的光谱特性影响最大,母片的图象密度和背景密度也有影响。     

提高中子管稳定工作束流的措施

改进气压调节系统!采用自成靶,使中子管在自然冷却条件下稳定工作束流达800UA。D-D 反应中子产额可达10~7n/s,D-T 反应中子产额可达10~9n/s,使用寿命已超过500     

Synthesis and anticonvulsant activity of 7-benzylamino-4,5-dihydro-［1,2,4］triazolo［4,3-a］quinolines

A series of 7-substituted-benzylamino-4,5-dihydro-[1,2,4]triazolo[4,3-a]quinoline derivatives was synthesized and evaluated for their anticonvulsant activity.The subcutaneous pentylenetetrazole test(sc-PTZ)demonstrated that the most effective compound in controlling the sc-PTZ induced seizure was 7-(3-bromine-benzylamino)-4,5-dihydro-[1,2,4]triazolo[4,3-a]quinoline(4j)with an ED50 of 5.0 mg/kg and the PI of 20.7,which was also safer than the reference drugs.And the maximal electroshock test(MES)demonstrated that among these derivatives,7-(3-fluorobenzylamino)-4,5-dihydro-[1,2,4]trizolo[4,3-a]quinoline(4i),with an ED50 of 15.3 mg/kg and the PI of 7.2,was the safest in MES test.Furthermore,their neurotoxicities were measured by the rotarod neurotoxicity test,and the results showed that all derivatives possessed lower neurotoxicity.     

直肠管状腺瘤自发破裂1例报告

直肠管状腺瘤自发破裂在临床罕见,死亡率高,因此必须引起临床医生重视.     

Marine dinoflagellates from Lower Cretaceous Muling Formation of Jixi Basin,China and their palaeoenvironmental significance

Newly discovered marine dinoflagellates from the lower-middle parts of the Lower Cretaceous Muling Formation of the Jixi Basin, eastern Heilongjiang Province,China, were identified as Circulodinium cingulatum He et al.,C. attadalicum (Cookson et Eiscnack) Helhy, Palaeoperidinium cretaceum Pocock, Oligosphaeridium totum Brideaux and Sentusidinium sp. Most of these species are distributed in the marine Lower Cretaceous strata of Europe, North America,Africa, Australia and Asia. It demonstrates that a transgression occurred in eastern Heilongjiang Province during the deposition of the Muling Formation, which was previously considered to be a coal-bearing continental stratigraphic unit.The marine dinoflagellates indicated that the Muling Formation is Barremian in age. The Palaeogeographic framework of eastern HeUongjiang Province in Late Mesozoic era should be rebuilt through systematic facies analyses of the marine,paralic and terrestrial deposits.     

多重键的弯键模型

本文根据有关文献探讨了多重键的弯键模型及其理论依据。     

慢性肝炎患者91例庚型肝炎病毒抗体测定

目的：阐明HGV在慢性乙肝和慢性丙肝病人中的感染情况。方法：甩ELISA法检测上述二类对象的度型肝炎病毒抗体（抗—HGV）。结果：35例慢性丙肝中有13例阳性,阳性率为37．1％。56例慢性乙肝中有5例阳性,阳性率为8．9％。结论：侵性肝炎合并HGV感染率较高,尤其是慢性丙肝。可能是HBV和HCV感染易慢性化的原因之一,但较单一HBV和HCV感染的临床表现无明显加重趋势。     

蚕豆(Vicia faba)染色体形态结构的研究

关于蚕豆等植物染色体形态结构的工作已有所报道在研究植物染色体结构和探索G显带技术时需要大量的收缩程度较低的有丝分裂前期染色。有人提到放线菌素D可能阻碍染色体高度集缩,使前期增多,我们也曾报道过这一药物对植物染色体结构和显带的可能机制。在本文工作中我们进一步用放线菌素D处理、Giemsa染色的方法研究蚕豆染色体的     

A≤10原子核快中子散射的光学模型分析

应用球形光学模型,系统地分析了~3He、~6Li、~7Li、~9Be和~10B的快中子散射资料。所用的光学势为包含了面吸收和自旋轨道耦合项的Woods-Saxon型势。取实部(氵弓尔)散参数和面吸收深度为入射能量的线性函数,结果表明实部(氵弓尔)散参数随入射能量增加而缓慢减少。所得结果与实验资料符合得较好。